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Top Forums Shell Programming and Scripting Replace a certain string with string containing random rubbish Post 302296572 by MilanCZ on Wednesday 11th of March 2009 10:41:02 AM
Old 03-11-2009
Replace a certain string with string containing random rubbish

Hello,
in my shell script i have some multi-line text in a variable $TEMP - f.e.

blablahblah
blah blah
bla TARGET hgloglo

And i need to replace TARGET with text from another variable ($REPLACE), which is containing some text with nasty characters (\n, ", :, etc.) And stuff the altered text back into variable.

I've tried awk

Code:
TEMP=$(awk '{gsub(/TARGET/, "$REPLACE"); print}' <<< "$TEMP")

but "$REPLACE" is no longer a variable due its placement Smilie and i assume that even if i managed to force this string to act as a varible, i would be scre*ed, because of tons of special characters deployed into gsub's second argument.

Any ideas? Try perl?

Thanks for even reading this horrid text - i'm sorry for my english.
 

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LN(1)								   User Commands							     LN(1)

NAME
ln - make links between files SYNOPSIS
ln [OPTION]... [-T] TARGET LINK_NAME (1st form) ln [OPTION]... TARGET (2nd form) ln [OPTION]... TARGET... DIRECTORY (3rd form) ln [OPTION]... -t DIRECTORY TARGET... (4th form) DESCRIPTION
In the 1st form, create a link to TARGET with the name LINK_NAME. In the 2nd form, create a link to TARGET in the current directory. In the 3rd and 4th forms, create links to each TARGET in DIRECTORY. Create hard links by default, symbolic links with --symbolic. By default, each destination (name of new link) should not already exist. When creating hard links, each TARGET must exist. Symbolic links can hold arbitrary text; if later resolved, a relative link is interpreted in relation to its parent directory. Mandatory arguments to long options are mandatory for short options too. --backup[=CONTROL] make a backup of each existing destination file -b like --backup but does not accept an argument -d, -F, --directory allow the superuser to attempt to hard link directories (note: will probably fail due to system restrictions, even for the supe- ruser) -f, --force remove existing destination files -i, --interactive prompt whether to remove destinations -L, --logical dereference TARGETs that are symbolic links -n, --no-dereference treat LINK_NAME as a normal file if it is a symbolic link to a directory -P, --physical make hard links directly to symbolic links -r, --relative create symbolic links relative to link location -s, --symbolic make symbolic links instead of hard links -S, --suffix=SUFFIX override the usual backup suffix -t, --target-directory=DIRECTORY specify the DIRECTORY in which to create the links -T, --no-target-directory treat LINK_NAME as a normal file always -v, --verbose print name of each linked file --help display this help and exit --version output version information and exit The backup suffix is '~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX. The version control method may be selected via the --backup option or through the VERSION_CONTROL environment variable. Here are the values: none, off never make backups (even if --backup is given) numbered, t make numbered backups existing, nil numbered if numbered backups exist, simple otherwise simple, never always make simple backups Using -s ignores -L and -P. Otherwise, the last option specified controls behavior when a TARGET is a symbolic link, defaulting to -P. AUTHOR
Written by Mike Parker and David MacKenzie. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report ln translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
link(2), symlink(2) Full documentation at: <http://www.gnu.org/software/coreutils/ln> or available locally via: info '(coreutils) ln invocation' GNU coreutils 8.28 January 2018 LN(1)
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